Study on the Epidemiological Charactristics of Hemorrhagic Fever of Renal Syndrome in Western Area of Zhejiang Province for 40 Years

Objective To study the epidemiological charactristics of hemorrhagic fever of renal syndrome(HFRS) in western area of Zhejiang province,and make the measures targeting HFRS prevence.Methods Animal hosts in surveillant area were investigated.The serum of the patients and rodents were collected to test by immunofluorescence assay(IFA).Analysing virus carried rate of rodents by fluorescent antibody(FA).Results (18 070) cases were reported from 1965 to 2004 in western area of Zhejiang province,and the annual incident rate is(20.71/100,000).271 patients died and the fatality rate is(1.50%).HFRS was primarily a disease of the male peasants(of the) youth adults occurring predominantly.Most infections happened inNovember to January next year and April to June.The serum positive rate of patients is 62.66%.Apodemus agrarius and Rattus norvegicus are the main type of species rodents.The virus carried rate of rodents is(6.33%).Conclusion We still need enhance surveillance and prevention to control the HFRS.